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Vectors — Maths STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceMathsVectors2 Marks
MCQ
$[\hat{ i } \hat{ k } \hat{ j }]+[\hat{ k } \hat{ j } \hat{ i }]+[\hat{ j } \hat{ k } \hat{ i }]=$
  • A
    1
  • B
    3
  • C
    $-3$
  • ✓
    $-1$
✓

Answer

Correct option: D.
$-1$
(D) $[\hat{i} \hat{k} \hat{j}]+[\hat{k} \hat{j} \hat{i}]+[\hat{j} \hat{k} \hat{i}]=[\hat{i} \hat{k} \hat{j}]+[\hat{i} \hat{k} \hat{j}]-[\hat{i} \hat{k} \hat{j}]$
$\begin{array}{l}=[\hat{ i } \hat{ k } \hat{ j }] \\ =-1\end{array}$

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